Curious as to why a combiner would instantly combine when the ignition key is turned on, unless the combiner is wired to always parallel the battery banks when key turned. Blue Seas M-L series are designed to parallel banks for additional power if needed.

Because some builders choose to shortcut using real voltage sensitive relays like the ACR or Yandina and use simple key on relays instead.

Our Combiners require 13.0 volts or higher for at least 30 seconds before they turn on. This usually happens fairly rapidly after a battery is put on charge.

If it is one of our Combiners that has failed, it has unlimited warranty, please return it for free repair/replacement.

They are designed to cycle on and off if the house battery is low, this limits the load on the alternator to a safe level. In 18 years of manufacturing Combiners we have never had a warranty return where the relay contacts died of old age. In fact one from a commercial fising boat was returned because it was "buzzing" (the timing capacitor had been broken off in assembly). So it ran up over 25 years of normal use in a few months. The contacts were worn but looked like they still had another 25 years in them.

Our Combiners require 13.0 volts or higher for at least 30 seconds before they turn on. This usually happens fairly rapidly after a battery is put on charge.

If it is one of our Combiners that has failed, it has unlimited warranty, please return it for free repair/replacement.

They are designed to cycle on and off if the house battery is low, this limits the load on the alternator to a safe level. In 18 years of manufacturing Combiners we have never had a warranty return where the relay contacts died of old age. In fact one from a commercial fising boat was returned because it was "buzzing" (the timing capacitor had been broken off in assembly). So it ran up over 25 years of normal use in a few months. The contacts were worn but looked like they still had another 25 years in them.

I have one of your combiners that has over 50k nm, 2700 hours of "dumb regulated" enginecharging plus 5 years 6 months of 24/7 solarcharging on it as well as many, many hundreds of hours of shore charging.

The combiner still looks and performs just as it did when it was brand new. Properly built voltage sensitive relays will last a long, long time. Using a key on relay as a charging relay... well.... who knows how long..

Oh and it holds up well in the corrosive marineenvironment. This was in a battery compartment with 4 wet cell batts for the entire duration...